Reading Assignment for Section 3.5

Read the following subsection from our online textbook: Section 3.5: Hair Evidence.

What You Will Learn

In this section, you’ll explore the evolution of hair analysis in forensic science, from traditional microscopic examination to the advanced use of nuclear and mitochondrial DNA testing. You’ll learn how to differentiate between human and animal hair based on key characteristics, and understand how these distinctions aid forensic investigations. Additionally, you’ll identify the microscopic features used to classify human hair and their significance in linking individuals to crime scenes. Finally, you’ll delve into the role of DNA analysis in hair evidence, the techniques for recovering and analyzing hair, and best practices to prevent contamination during examination.

Student Learning Outcomes for Section 3.5

• SLO 1: Explain the evolution of hair analysis in forensic science, including the transition from microscopic examination to the integration of nuclear and mitochondrial DNA testing.
• SLO 2: Differentiate between human and animal hair based on key characteristics such as medulla patterns, pigmentation, and structural differences, and describe how these distinctions contribute to forensic investigations.
• SLO 3: Identify the key microscopic characteristics used in the forensic classification of human hair, including color, root appearance, and artificial treatments, and assess their significance in linking individuals to crime scenes.
• SLO 4: Discuss the role of DNA analysis in hair evidence, including the conditions under which nuclear or mitochondrial DNA analysis is used, and evaluate the advantages and limitations of each method.
• SLO 5: Describe the techniques and best practices for recovering and analyzing hair evidence, including the selection of hairs for examination and the importance of controlled environments to prevent contamination.